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Balaenidae (/ b ə ˈ l ɛ n ɪ d eɪ,-d iː /) is a family of whales of the parvorder Mysticeti (baleen whales) that contains mostly fossil taxa and two living genera: the right whale (genus Eubalaena), and the closely related bowhead whale (genus Balaena).
Throughout history, the family Balaenidae has been the subject of great taxonomic debate. Authorities have repeatedly recategorized the three populations of right whale plus the bowhead whale, as one, two, three or four species, either in a single genus or in two separate genera.
The fin whale is the fastest among baleen whales, having been recorded travelling as fast as 10 m/s (36 km/h; 22 mph), and sustaining a speed of 2.5 m/s (9.0 km/h; 5.6 mph) for an extended period. [51] While feeding, the rorqual jaw expands to a volume that can be bigger than the whale itself; [52] to do this, the
†Balaenula astensis Trevisan, 1942 (from Italy) [2] Balaenula is an extinct genus of baleen whale species which lived during the Pliocene epoch of Europe and possibly North America. [ 3 ] [ 4 ] Balaenula is a small whale measuring within the range of 6–8 metres (20–26 ft) in length.
The communities first split because of the joining of North and South America. The rising temperatures of the equator then created a second split, into northern and southern groups, preventing them from interbreeding. [20] "This puts an end to the long debate about whether there are three Eubalaena species of right whale. They really are ...
SPOILER ALERT: This contains major spoilers for the ending of “Dune: Part Two,” now playing in theaters. Readers of Frank Herbert’s 1965 novel “Dune” have known the plot of the sci-fi ...
Pregnant females eat roughly four percent of their body weight daily, [95] amounting to 60% of their overall body weight throughout summer foraging periods. [ 89 ] [ 96 ] Gestation may last 10–12 months with calves being 6–7 meters (20–23 ft) long and weighing 2–3 metric tons (2.0–3.0 long tons; 2.2–3.3 short tons) at birth. [ 89 ]
Rorquals (/ ˈ r ɔːr k w əl z /) are the largest group of baleen whales, comprising the family Balaenopteridae, which contains nine extant species in two genera.They include the largest known animal that has ever lived, the blue whale, which can reach 180 tonnes (200 short tons), and the fin whale, which reaches 120 tonnes (130 short tons); even the smallest of the group, the northern minke ...